National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Partly Cloudy

71°F

22°C

Humidity 43%
Wind Speed NW 7 mph
Barometer 29.87 in
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 16 Jun 2:35 pm EDT
Extended Forecast for

2 Miles S Exton PA

  • This Afternoon

    This Afternoon: Sunny, with a high near 76. Southwest wind around 5 mph.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, increasing clouds, with a low around 59. Southeast wind around 5 mph.

    Low: 59 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 80. South wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Showers
    Likely and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 66. South wind around 5 mph.

    Low: 66 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 89. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 66. Chance of precipitation is 20%.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 76. Southwest wind around 5 mph.
Tonight
Patchy fog after 4am. Otherwise, increasing clouds, with a low around 59. Southeast wind around 5 mph.
Wednesday
Showers likely, with thunderstorms also possible after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 80. South wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Increasing clouds, with a low around 66. South wind around 5 mph.
Thursday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 89. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
Juneteenth
Mostly sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 59.
Saturday
Sunny, with a high near 80.
Saturday Night
Clear, with a low around 59.
Sunday
Sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 61.
Monday
A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Exton PA
 40.01°N 75.64°W (Elev. 476 ft)
Last Update:
4:07 am EDT Jun 16, 2026
Forecast Valid:
2pm EDT Jun 16, 2026-6pm EDT Jun 22, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation